Intra-Matic Auto Chrono 40mm

How it wears

Wears larger than its 40 mm case suggests

Hamilton Intra-Matic Auto Chrono 40mm measures 49.2 mm lug-to-lug on a 40 mm case, a lug-to-lug ratio of 1.23 against a database median of 1.18. That span is longer than 76% of the 7,413 watches in this database and longer than 60% of the 80 Hamilton watches listed.

A flat wrist width of 55 mm (2.17 in) or more keeps it in the balanced range, and from 66 mm (2.60 in) it starts to look compact. Below 49.2 mm (1.94 in) the lugs are likely to overhang the wrist. Flat wrist width is measured straight across the top of the wrist, not around it.

At 14.45 mm thick it is on the thicker side, thicker than 87% of the watches with a listed thickness.